Scientific Research Publishing

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=48996#.VJeK8cCAM4 Author(s) Shilpi Gupta , Upena Dalal , Vishnu Narayan Mishra Affiliation(s) Electronics Engineering Department, Sardar Vallabhbhai National Institute of Technology, Surat, India . Electronics Engineering Department, Sardar Vallabhbhai National Institute of Technology, Surat, India . Applied Mathematics & Humanities Department, Sardar Vallabhbhai National Institute of Technology, Surat, India; L. 1627 Awadh Puri Colony Beniganj, Faizabad, Uttar Pradesh, India . ABSTRACT The system performance has been analyzed for π/4 DQPSK mapping scheme, which is differential in nature and hence adding additional advantage. P...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=51171#.VFgtwmfHRK0 Author(s)   Benattou Fassi 1 , Ali Djebbari 1 , Abdelmalik Taleb-Ahmed 2 Affiliation(s) 1 Telecommunications and Digital Signal Processing Laboratory, Djillali Liabes University of Sidi Bel Abbes, Sidi Bel Abbes, Algeria . 2 LAMIH UMR CNRS 8530, University of Valenciennes and Hainaut-Cambresis (UVHC), le Mont Houy,France . ABSTRACT In this paper we propose a new class of ternary Zero Correlation Zone (ZCZ) sequence sets based on binary ZCZ sequence sets construction. It is shown that the proposed ternary ZCZ sequence sets can reach the upper bound on the ZCZ sequences. The performance of the proposed sequences set in asynchronous Direct Sequence-Code Division Multiple Access (DS-CDMA) system is evaluated. In the simulation we used two types of channels: Additive White Gaussian Noise (AWGN) and frequ...